Is t he multiple choice on top right? Solve long answer pls An RL circuit consis

Question

Is t

he multiple choice on top right? Solve long answer pls

An RL circuit consists of a switch, an emf source resistor, and a 4.0 H Inductor It the potential across the resistor is 65.0 V at 2.0 ms after the switch is closed, find the source emf A large electromagnet has a 22 T magnetic field between its poles. What is the magnetic energy density between the poles? In Figure 2, there is a uniform magnetic field of magnitude B = 2.8 T and directed into the plane of the paper in the region shown Outside this region the magnetic field is zero. A rectangular loop 0.20 m by 0.60 m and of resistance 2 Q is being pased into the magnetic field by an external force, as shown. What is the direction (clockwise or counterclockwise) of the current induced in the loop? Calculate the magnitude of the external force Fext required to move the loop at a constant speed of v =3.9 m/s. The mass of the loop is 0.008 kg.

Explanation / Answer

a) clockwise

b) F= B^2*L^2*V/R=2.8^2*0.2^2*3.9/2=0.6115N

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